Abstract

The purpose of this document is to provide a discussion of the
potential problems of using private, RFC 1918, or non-globally
routable addressing within the core of a Service Provider (SP)
network. The discussion focuses on link addresses and, to a small
extent, loopback addresses. While many of the issues are well
recognised within the ISP community, there appears to be no document
that collectively describes the issues. This document is not an Internet
Standards Track specification; it is published for informational purposes.